Supplemental Share Information - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Share Information Treasury Stock RollForward
Treasury Stock, Shares, Beginning Balance	367,457,888	349,148,819	347,306,778
Reacquired stock	7,575,647	23,526,293	10,209,963
Issuances pursuant to stock options and benefit plans	(6,185,314)	(5,217,224)	(8,367,922)
Treasury Stock, Shares, Ending Balance	368,848,221	367,457,888	349,148,819